Now it is back, June 14 -- SAN FRANCISCO - The last time anyone watched a six-second video loop on Vine, Donald Trump had just been inaugurated, Logan Paul had not yet fought Floyd Mayweather, and TikTok did not exist. That was 2017. The platform that invented the format - and the internet culture that came with it - was dead by January of that year, killed off by Twitter after the company could not find a way to make money from it.

that generative AI has made the internet so crowded with synthetic content that the only valuable thing left is proof that a human made something. The six-second limit is the same. The ambition is considerably larger.

The app launched publicly on the Apple App Store and Google Play in late April, offering ac...